Hand brake



W. H. SAUVAGE.

HAND BRAKE. APPLICATION FILED AUGIL I9I9.

' Patented June 20,1922

zwuenzof' PATENT OFFTQE.

WILLIAM H. SAUVAGE, OF FLUSHING, NEW YGRK.

HAND BRAKE.

inseam.

Application filed August 7, 1919. Serial No. 315,909.

T 0 all whom it may concern Be it known that I, W'ILLIAM H. Sauvaon, a citizen of the United States, residing at Flushing, Long Island in the county of Queens and State of ldew York, have invented certain new and useful Improvements in Hand Brakes, of which the following is a specification.

This invention relates to hand brakes and more particularly to high power hand brakes particularly adapted for use on railwa vehicles of all kinds.

ne of the objects of the present invention is to provide a simple and practical high power hand brake having relatively few parts and which will be of strong and durable construction. A further object is to rovide a reliable and eliicient hand brake of the above character adapted to prevent over-load' strain being exerted upon the brake rigging. A further object is to pro vide a brake of the above character which may be applied to the brake rigging now in general use without material alterations. A. further object is to provide a hand brake for railway vehicles which will allow. the

brakes to be easily and quickly taken up with a maxlmum amount of power, and

which will have its working parts so completely housed and protected as to be unaffected by atmospheric conditions.

A further object'is to provide a hand brake free from ratchet or other unreliable mechanism that so often cause accidents.

Other objects will be in part obvious from the annexed drawings and in part indicated in connection therewith by the following analysis of this invent-ion.

This invention accordingly consists in the features of construction, combination of parts and in the unique relations of the members and in the relative proportioning and disposition thereof, all as more completely outlined herein.

' To enable others skilled in the art so fully to comprehend the underlying features thereof that they may embody the same by the numerous modifications in structure and relation contemplated by this invention, drawings depicting a preferred form have been annexed as a part of this disclosure, and

In such drawings, like characters of reference denote corresponding parts throughout all the views, in which-' F 1g. is a front elevational view, partly in section, showing the complete mechanism;

F 2 is a horizontal plan view partly in section.

Referring now to the drawings in detail 5 denotes a casing of any desired type, adapted to be secured to the front end of the car, for example, by means of the fastening devices passing through perforated lugs 6. This casing is provided with a removable cover, or plates as necessary, wherebythe parts may be conveniently assembled. Within the casing is mounted a shaft 7 provided with hand operating means such as a wheel 8 provided with a handle 10. This shaft is mounted in suitable bearings in the upper part of the casing and has throughout the major portion of its length threads 11 adapted to mesh with a worm pinion 12 carried by shaft 13 mounted in the casing. Also mounted upon this shaft 13 is a spiral winding drum 14 upon which a cable or chain 15 is adaptedto be wound. As herein shown, this chain passes through a sheave 16 and has its oppositeend connected with an eye 17, the sheave 16 being connected to the load chain or pull rod as shown. If a low power is desired the chain 15 may be directly connected with the foundation brake rigging.

In order to take up the end thrust exerted upon the worm 11 there is provided a thrust ball bearing 20 as shown in Fig. 1, one part of which coacts with the shaft 7 and the other is held by a washer 22 yieldingly held in place by means of a spring 23 seated in chamber 24. The washer preferably has a lug 25 adapted to slide in a groove or slot 26 to prevent turning. Thissliding movement takes place when excess load occurs, or in other words is adapted to move when :1. lug 27 carried by the shaft 7 laterally engages with a cam lug 28 on the casing 5, thereby positively preventinga further turning of the hand wheel 8. The cam permits unwinding at any time. This prevents excess power being transmitted to the founda tion brake rigging which might break some of the connecting links.

The operation of this device is substantially as follows: Assuming the parts to be in the position shown in Fig. 1, a rotation of the hand Wheel will cause the chain 15 to wind up on the spiral drum With a co nstantly increasing ower. If this power exceeds, a predetermined amount however, as provided for by "the spring 23, which if desired may be adjusted to any degree of tension, then the brake pressure will cause the shaft 17 to move relatively towards the left, whereby the stops 2? and 28 comeinto engagement, thus preventing a further turning of the hand wheel8.

From the above it will be seen that the invention provides a simple hand brake having relatively few parts adapted to give the maximum high power quick take up and release, and one which will be thoroughly reliable and efficient in useand operation.

I realize that considerable variation is possible in the details of construction and arrangement of parts without departing from the spirit of my invention, and I therefore do not-intend to limit myself to the specific form shown and described.

I I claim:

1. In a hand brake, incombination, a sup port, a shaft mounted therein, a thread on the shaft, a pinion meshing with the shaft, a spiral drum adapted to be actuated by the pinion, and means adapted to prevent overloading by locking said shaft against further rotation.

2. In a hand brake, in combination, a shaft, a spiral winding drum geared thereto, and means adapted to prevent overload on said drum by locking said shaft against further rotation.

3. In a hand brake, in combination, a shaft, a spiral winding drum geared thereto, and means adapted to prevent overload, said means comprising a stop, and means permitting a longitudinal movement of the shaft on overload to carry the stop to operative position.

4. In a hand brake, in combination, a shaft, a worm and pinion associated therewith, a spiral drum adapted to be rotated thereby and upon which a brake chain is adapted to be wound and a lock for said shaft yieldingly held out of operation until the drum is subjected to overload.

5. In a hand brake, in combination, a longitudinally movable shaft, a worm and pinion associated therewith, a spiral drum adapted to be rotated thereby and upon which a brake chain is adapted to be wound, a yielding thrust bearing for said shaft and a lock for preventing further movement of said shaft when said thrust bearing yields.

6. In a hand brake, in-combination, a shaft, a worm and pinion associated therewith, a

spiral drum adapted to be rotated thereby and upon which a brake chain is adapted to be wound, a thrust bearing for said shaft, means adapted to permit a longitudinal movement of said shaft upon overload and means preventing application of the brakes after overload occurs.

7 In a hand brake, in combination, a shaft, a worm and pinion associated therewith,a spiral drum adapted to be rotated thereby and upon which a brake chain is adapted to be wound, a thrust bearing for said shaft, means adapted to permit a longitudinal movement of said shaft upon overload, and means associated with said shaft for locking the same against rotation when such prede: termined longitudina1 movement takes place.

8. In a hand brake, in combination, a we ing, a shaft having a'thread thereon, a pinion meshing therewith, a member adapted to be turned by said pinion to apply the brakes,

a thrust bearing and a yielding support for said thrust bearing having means to prevent rotary movement of said shaft.

9. In a hand brake, in combination, 2:. casing, a shaft having a thread thereon, a pinion meshing therewith, a drum adapted to be turned by said pinion, a thrust bearing, and means adapted to lock said shaft against rotation when said thrust bearing yields on overload.

10. In a hand brake,in combination, a casing, a shaft mounted therein, a drum upon which a brake chain is adaptedto be wound, means for transmitting motion from the shaft to the drum, and a lock for said shaft operative on overload on said drum.

11. In a handbrake, in combination, a casing, a spiral drum upon which a brake chain is adapted to be wound, means for transmitting motion from the shaft to the drum, and a lock for said shaft when overload takes place, said locking means comprising a lug on said shaft and a lock on the casing adapted to be engaged thereby. V

12. In a hand brake, in combination, a casing, a worm shaft therein, a spiral drum upon which a brake chain is adapted to be" wound, means for transmitting motion from the shaft to the drum, and means yieldingly supporting one end of said shaft against overloading, comprising a sprin and a thrust bearing interposed between the spring and the shaft, also means for locking said shaft against further rotation when said thrust bearing yields.

13. In a hand brake, in combination, a casing, a moveable threaded shaft mounted therein, a yielding thrust bearing and intervening ball bearing adapted to co-act there with, a pinion operatively associated with said threaded shaft, a spiral drum adapted to be rotated by the associated shaft and pinion, automatic stop means associated with said shaft and operatively associated with guide slot for said bearing, said thrust bear- 10 ing being intermediately positioned between the yiel ing support and the threaded shaft, means adapted to lock said shaft against fun ther rotation in braking direction yet positioned to permit immediate reverse rotation 15 of the shaft.

In testimony whereof I affix my signature. LLIAM H. SAUVAGE. 

